Fuse-receptacle lock



G. WESLEY.

FUSE RECEPTACLE LOCK. APPUCATIQN mio SEPT. la. 1915.

1 1 93,646. Patented Aug'. 8, 1916.

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GUSTAF WESLEY, QF'ST. PAUL, MINNESOTA.

FUSE-RECEPTACLE LOCK.

Specification of Letters Patent.

I Patented Aug. S, 1916.

Application filed September 18, 1915. Serial No. 51,371.

To all whomz't may concern:

Be it known that I, GUSTAF IVESLEY, a citizen of the United States, residin at St. Paul, in the county of Ramsey and tate of llilinnesota, have invented a new and useful Improvement in F use-Receptacle Locks, of which the following is a specification.

The object of this invention is to provide an improved construction by the employment of which the unauthorized use of a fuse receptacle is prevented.

Much trouble and annoyance has occurred by unscrupulous ypersons inserting fuse plugs or feed wires clandestinely in the circuits with which the receptacle is connected. This use is prevented by my invention in a simple and effective manner.

To these ends my invention comprises the features of construction and combination of parts hereinafter more particularly described and claimed.

In the drawing, Figure 1 is a plan of my invention; Fig. 2 is a section taken on the line X-X of Fig. 1; Fig. 3 is a plan partly in section of an alternative construction, and Fig. 4 is an end View of the construction illustrated in Fig. 3.

In the drawing, A indicates an ordinary insulating base having the usual receptacles 3 of any number desired, in each of which a threaded shell or lining 4 is held adjacent to a terminal piece 5. The threaded shell and terminal piece are respectively connected to the binding posts 6 and 7 in the usual manner to which the circuit wires may be attached. The usual fuse plugs not shown are insertible in the receptacle openings described in the usual manner, and when the circuits are disconnected, as for instance, when a meter is removed, andl it is not desired to disconnect the fuse receptacle from the circuits, my invention provides the use of blank plugs such as B containing no fuses and made out of insulating material threaded to screw into the threaded shells 4. A cover plate C having openings 8 of suitable size to receive the shanks 9 of the false plugs B is placed over the fuse receptacle and its sides 10 incline downwardly to protect the binding posts 6 and 7, so that an unauthorized person cannot insert lead wires. The head portion 11 of each false plug serves to hold the cover C tightly on the base and resting upon the upper end of the receptacles. In order to lock the false plugs in position, holding the cover in place, a lock member in the form of a plate D is placed 'over the false plugs, said lock member being formed with hooks 12 engaging the cover plate C through suitable openings 13 along one side edge. The opposite side edge of the lock member is formed with perforated lugs 14, which coincide with perforated lugs 15 on one of the sides of the cover plate. A wire 16 is passed through the perforations of the lugs 14 and 15, and its meeting ends locked by a seal 17, thus serving to hold the lock plate D in locked position on the cover member. This lock member co-acts with the cover member, to hold the false plugs inserted in the receptacles, so that access cannot be obtained to the electrical terminal members in the receptacle openings for attaching any lead wires. The cover and lock members are preferably made out of insulating material.

In the construction illustrated in Figs. 3 and 4 the cover member E is of substantially the same construction as that employed in the structure illustrated in Figs. 1 and 2, excepting that no openings such as 13 or lugs such as 14 and 15 are necessary. The blank plugs F are provided with openings 18 through which the locking wire 19 is threaded, said wire having its meeting ends secured by a seal 20. In this manner the false plugs F are prevented from being removed and the cover E locked upon the receptacle by fastening means cooperating indirectly with the cover E, to protect the binding posts and electrical terminals.

In accordance with the patent statutes, I have described the" principles of operation of my invention together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the construction shown is only illustrative and that the invention can be carried out by other means and applied to uses other than those above set forth within the scope of the following claims.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A device of the class set forth, comprising, in combination, a base having a receptacle with an opening to receive a fuse plug, a cover provided with a hole registering with said receptacle opening, said cover extending over said receptacle when in registering position, a false plug threaded into said receptacle opening and holding said cover' in place and means coperating with said cover for locking said false plug in inserted position through said cover.

2. A device of the class set forth, comprising, in combination, a base having a receptacle with an opening to receive a fuse plug, a cover provided With a hole registering with said receptacle opening, said cover extending over said receptacle when in registering position, a plug passing through the hole in said cover and entering said receptacle opening for holding said cover on said base and means cooperating with said cover for locking said plug in inserted position.

3. A device of the class set forth, comprising, in combination, a. base having a fuse plug receptacle with an opening to receive a fuse plug, a cover provided with a hole registering with said receptacle opening, said cover extending over said receptacle When in registering position, and covering said base,

a plug inserted through said hole and entering said receptacle and engaging said cover, a lock plate detachably engaged with said cover and extending over said plug to prevent the latter from being removed from said receptacle and means for locking said lock member on said cover.

4. A device of the class set forth, comprising, ,in combination, a base having a fuse plug receptacle, a cover over said base having a.' hole registering with said receptacle, a plug passing through said hole and entering said receptacle for holding said cover upon said base, a lock plate detachably mounted upon said cover over said plug to prevent the latter from being removed from said receptacle and a seal locking said lock member on said cover.

In testimony whereof, I have signed my name to this specification.

GUSTAF WESLEY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

